2521163966 has 4 divisors (see below), whose sum is σ = 3781745952. Its totient is φ = 1260581982.

The previous prime is 2521163959. The next prime is 2521163993. The reversal of 2521163966 is 6693611252.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 630290990 + ... + 630290993.

It is an arithmetic number, because the mean of its divisors is an integer number (945436488).

Almost surely, 2^2521163966 is an apocalyptic number.

2521163966 is a deficient number, since it is larger than the sum of its proper divisors (1260581986).

2521163966 is a wasteful number, since it uses less digits than its factorization.

2521163966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1260581985.

The product of its digits is 116640, while the sum is 41.

The square root of 2521163966 is about 50211.1936324959. The cubic root of 2521163966 is about 1361.0279076575.

The spelling of 2521163966 in words is "two billion, five hundred twenty-one million, one hundred sixty-three thousand, nine hundred sixty-six".